There are currently 259 large-scale pig-raising farms in Hai Duong. There, environmental pollution handling is always a stinging problem.
A Japanese expert checks a wastewater filtration tank in Bui Huy Hanh breeding farm
Early in 2012, the provincial People’s Committee approved the project “Applying Japanese SAIBON technology to building a model of pig-farming wastewater treatment at Bui Huy Hanh farm in Tai Son commune (Tu Ky)” to diminish environmental pollution.
Bui Huy Hanh farm started operation in 2007 with an area of 3 ha and a breeding scale of 1,200 sows. The farm annually supplies nearly 30,000 commercial breeding pigs to the market.
To protect the environment, the farm has got access to Japanese SAIBON wastewater treatment technology.
The project was approved with a total investment of over VND4.2 billion, of which more than VND2.3 billion was deducted from the budget for the science and technology career to support the construction, Japanese companies spent VND1.4 billion (including materials and equipment imported from Japan and expert costs), the farm invested VND510 million in building temporary roads, buying water pumps, etc.
The execution of the project began in July 2012.
Three biogas cellars of the farm have been removed for the construction of five filtration tanks automatically pumping and watering employing SAIBON systems.
The work items consist of a pipe system for water filtration, a filtration ground, and tanks containing SAIBON systems.
The working principle of the system is that wastewater is collected into concentrated reservoirs and directly pumped into the tanks in which SAIBON devices are installed, flows into auxiliary discharge tanks and then to the filtration ground where perforated pipes are placed to collect the entire wastewater after filtration.
Reeds are planted and earthworms are raised at the filtration ground to carry out the microbiological treatment process.
After proper treatment, the wastewater ensures requirements of discharge into rivers.
Farm owner Bui Quang Huy said, “Wastewater is filtered through many stages. The filtered water can be used for aquaculture and ensures river discharge conditions. In the coming time, I hope functional agencies will continue paying attention, transfering new technology, and helping breeding farms in the province remedy the environmental pollution situation.”
According to the Hai Duong Department of Natural Resources and Environment, Department of Science and Technology, and Japanese experts, the farm, with wastewater treatment results having so far reached over 80%, is now eligible to get out of the list of environmental polluters.
The technology operates automatically without the use of electricity, thus saving maximum power.
At present, the farm monthly sells piglets 4 – 5 times and achieves over VND500 million of revenue on average.
More than 40 workers are living and working in the farm with a salary of VND3.5 million/ person/ month.
With the effectiveness of the project, the provincial People’s Committee and specialized units are expected to continue helping and multiplying the model at breeding farms in the province.
MINH NGUYEN
Đăng ký: VietNam News
